In this question there are eleven downvotes. I know from downvotes I have gotten that each downvote subtracts 2 points. 2x11=22 should be deleted. The user has a remainder of 8. How is this possible? Even if he/she came with the dowry of 100 from another site, still 8 is not what it should be:78 is not 8. Is there another rule?
When I look at his reputation log:
I see reputation-altering events that add up +35 (7 upvotes) and -28 (mostly downvotes, but also a couple "user was removed."
Add in the +1 for what the user presumably started at, and it makes sense.
I think the "rule" you're forgetting is that rep can't go below 1, so when you look at his first day, he started at 1, got 1 upvote (+5) and 6 downvotes. But the first 4 of those downvotes didn't count against him because rep can't go below 1 and they came before he got any upvotes.
I think that also applies to the -1 showing for a downvote the next day: he only had 2 rep, that downvote only cost him 1.